NO REFLOW PHENOMENON

No reflow is a phenomenon in which myocardial ischemia and reduced antegrade flow occur despite the absence of proximal stenosis, spasm, dissection, or embolic cut off of major distal branches.1in another word no reflow phenomenon means failure of restoration of myocardial flow despite removal of epicardial coronary obstruction.2 the incidence is 2% with plain balloon angioplasty(ptca), 7% in patients undergoing rotational atherectomy, 12% for primary percutaneous coronary intervention (pci), and much higher at 42% for pci of degenerated saphenous vein graft(svg).3